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335 lines
12 KiB
335 lines
12 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>t14/cannon.cpp Example File</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>t14/cannon.cpp Example File</h1>
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<pre>/****************************************************************
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**
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** Implementation CannonField class, TQt tutorial 14
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**
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****************************************************************/
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#include "cannon.h"
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#include <<a href="qtimer-h.html">ntqtimer.h</a>>
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#include <<a href="qpainter-h.html">ntqpainter.h</a>>
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#include <<a href="qpixmap-h.html">ntqpixmap.h</a>>
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#include <<a href="qdatetime-h.html">ntqdatetime.h</a>>
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#include <math.h>
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#include <stdlib.h>
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<a name="f121"></a>CannonField::CannonField( <a href="ntqwidget.html">TQWidget</a> *parent, const char *name )
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: <a href="ntqwidget.html">TQWidget</a>( parent, name )
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{
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ang = 45;
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f = 0;
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timerCount = 0;
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autoShootTimer = new <a href="ntqtimer.html">TQTimer</a>( this, "movement handler" );
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<a href="ntqobject.html#connect">connect</a>( autoShootTimer, TQ_SIGNAL(<a href="ntqtimer.html#timeout">timeout</a>()),
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this, TQ_SLOT(moveShot()) );
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shoot_ang = 0;
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shoot_f = 0;
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target = TQPoint( 0, 0 );
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gameEnded = FALSE;
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barrelPressed = FALSE;
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<a href="ntqwidget.html#setPalette">setPalette</a>( TQPalette( TQColor( 250, 250, 200) ) );
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newTarget();
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}
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void <a name="f122"></a>CannonField::setAngle( int degrees )
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{
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if ( degrees < 5 )
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degrees = 5;
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if ( degrees > 70 )
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degrees = 70;
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if ( ang == degrees )
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return;
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ang = degrees;
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<a href="ntqwidget.html#repaint">repaint</a>( cannonRect(), FALSE );
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emit angleChanged( ang );
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}
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void <a name="f123"></a>CannonField::setForce( int newton )
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{
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if ( newton < 0 )
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newton = 0;
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if ( f == newton )
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return;
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f = newton;
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emit forceChanged( f );
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}
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void <a name="f124"></a>CannonField::shoot()
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{
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if ( isShooting() )
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return;
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timerCount = 0;
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shoot_ang = ang;
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shoot_f = f;
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autoShootTimer-><a href="ntqtimer.html#start">start</a>( 50 );
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emit canShoot( FALSE );
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}
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void <a name="f125"></a>CannonField::newTarget()
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{
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static bool first_time = TRUE;
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if ( first_time ) {
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first_time = FALSE;
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<a href="qtime.html">TQTime</a> midnight( 0, 0, 0 );
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srand( midnight.<a href="qtime.html#secsTo">secsTo</a>(TQTime::<a href="qtime.html#currentTime">currentTime</a>()) );
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}
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<a href="ntqregion.html">TQRegion</a> r( targetRect() );
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target = TQPoint( 200 + rand() % 190,
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10 + rand() % 255 );
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<a href="ntqwidget.html#repaint">repaint</a>( r.<a href="ntqrect.html#unite">unite</a>( targetRect() ) );
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}
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void <a name="f126"></a>CannonField::setGameOver()
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{
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if ( gameEnded )
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return;
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if ( isShooting() )
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autoShootTimer-><a href="ntqtimer.html#stop">stop</a>();
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gameEnded = TRUE;
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<a href="ntqwidget.html#repaint">repaint</a>();
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}
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void <a name="f127"></a>CannonField::restartGame()
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{
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if ( isShooting() )
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autoShootTimer-><a href="ntqtimer.html#stop">stop</a>();
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gameEnded = FALSE;
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<a href="ntqwidget.html#repaint">repaint</a>();
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emit canShoot( TRUE );
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}
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void <a name="f128"></a>CannonField::moveShot()
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{
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<a href="ntqregion.html">TQRegion</a> r( shotRect() );
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timerCount++;
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<a href="ntqrect.html">TQRect</a> shotR = shotRect();
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if ( shotR.<a href="ntqrect.html#intersects">intersects</a>( targetRect() ) ) {
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autoShootTimer-><a href="ntqtimer.html#stop">stop</a>();
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emit hit();
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emit canShoot( TRUE );
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} else if ( shotR.<a href="ntqrect.html#x">x</a>() > width() || shotR.<a href="ntqrect.html#y">y</a>() > height() ||
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shotR.<a href="ntqrect.html#intersects">intersects</a>(barrierRect()) ) {
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autoShootTimer-><a href="ntqtimer.html#stop">stop</a>();
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emit missed();
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emit canShoot( TRUE );
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} else {
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r = r.<a href="ntqrect.html#unite">unite</a>( TQRegion( shotR ) );
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}
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<a href="ntqwidget.html#repaint">repaint</a>( r );
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}
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void CannonField::<a href="ntqwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
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{
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if ( e-><a href="qmouseevent.html#button">button</a>() != LeftButton )
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return;
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if ( barrelHit( e-><a href="qmouseevent.html#pos">pos</a>() ) )
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barrelPressed = TRUE;
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}
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void CannonField::<a href="ntqwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
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{
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if ( !barrelPressed )
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return;
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<a href="ntqpoint.html">TQPoint</a> pnt = e-><a href="qmouseevent.html#pos">pos</a>();
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if ( pnt.<a href="ntqpoint.html#x">x</a>() <= 0 )
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pnt.<a href="ntqpoint.html#setX">setX</a>( 1 );
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if ( pnt.<a href="ntqpoint.html#y">y</a>() >= <a href="ntqwidget.html#height">height</a>() )
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pnt.<a href="ntqpoint.html#setY">setY</a>( <a href="ntqwidget.html#height">height</a>() - 1 );
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double rad = atan(((double)<a href="ntqwidget.html#rect">rect</a>().bottom()-pnt.<a href="ntqpoint.html#y">y</a>())/pnt.<a href="ntqpoint.html#x">x</a>());
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setAngle( tqRound ( rad*180/3.14159265 ) );
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}
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void CannonField::<a href="ntqwidget.html#mouseReleaseEvent">mouseReleaseEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
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{
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if ( e-><a href="qmouseevent.html#button">button</a>() == LeftButton )
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barrelPressed = FALSE;
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}
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void CannonField::<a href="ntqwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">TQPaintEvent</a> *e )
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{
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<a href="ntqrect.html">TQRect</a> updateR = e-><a href="qpaintevent.html#rect">rect</a>();
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<a href="ntqpainter.html">TQPainter</a> p( this );
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if ( gameEnded ) {
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p.<a href="ntqpainter.html#setPen">setPen</a>( black );
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p.<a href="ntqpainter.html#setFont">setFont</a>( TQFont( "Courier", 48, TQFont::Bold ) );
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p.<a href="ntqpainter.html#drawText">drawText</a>( <a href="ntqwidget.html#rect">rect</a>(), AlignCenter, "Game Over" );
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}
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if ( updateR.<a href="ntqrect.html#intersects">intersects</a>( cannonRect() ) )
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paintCannon( &p );
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if ( updateR.<a href="ntqrect.html#intersects">intersects</a>( barrierRect() ) )
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paintBarrier( &p );
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if ( isShooting() && updateR.<a href="ntqrect.html#intersects">intersects</a>( shotRect() ) )
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paintShot( &p );
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if ( !gameEnded && updateR.<a href="ntqrect.html#intersects">intersects</a>( targetRect() ) )
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paintTarget( &p );
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}
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void <a name="f129"></a>CannonField::paintShot( <a href="ntqpainter.html">TQPainter</a> *p )
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{
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p-><a href="ntqpainter.html#setBrush">setBrush</a>( black );
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p-><a href="ntqpainter.html#setPen">setPen</a>( NoPen );
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p-><a href="ntqpainter.html#drawRect">drawRect</a>( shotRect() );
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}
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void <a name="f130"></a>CannonField::paintTarget( <a href="ntqpainter.html">TQPainter</a> *p )
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{
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p-><a href="ntqpainter.html#setBrush">setBrush</a>( red );
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p-><a href="ntqpainter.html#setPen">setPen</a>( black );
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p-><a href="ntqpainter.html#drawRect">drawRect</a>( targetRect() );
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}
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void <a name="f131"></a>CannonField::paintBarrier( <a href="ntqpainter.html">TQPainter</a> *p )
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{
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p-><a href="ntqpainter.html#setBrush">setBrush</a>( yellow );
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p-><a href="ntqpainter.html#setPen">setPen</a>( black );
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p-><a href="ntqpainter.html#drawRect">drawRect</a>( barrierRect() );
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}
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const <a href="ntqrect.html">TQRect</a> barrelRect(33, -4, 15, 8);
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void <a name="f132"></a>CannonField::paintCannon( <a href="ntqpainter.html">TQPainter</a> *p )
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{
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<a href="ntqrect.html">TQRect</a> cr = cannonRect();
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<a href="ntqpixmap.html">TQPixmap</a> pix( cr.<a href="ntqrect.html#size">size</a>() );
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pix.<a href="ntqpixmap.html#fill">fill</a>( this, cr.<a href="ntqrect.html#topLeft">topLeft</a>() );
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<a href="ntqpainter.html">TQPainter</a> tmp( &pix );
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tmp.<a href="ntqpainter.html#setBrush">setBrush</a>( blue );
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tmp.<a href="ntqpainter.html#setPen">setPen</a>( NoPen );
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tmp.<a href="ntqpainter.html#translate">translate</a>( 0, pix.<a href="ntqpixmap.html#height">height</a>() - 1 );
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tmp.<a href="ntqpainter.html#drawPie">drawPie</a>( TQRect( -35,-35, 70, 70 ), 0, 90*16 );
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tmp.<a href="ntqpainter.html#rotate">rotate</a>( -ang );
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tmp.<a href="ntqpainter.html#drawRect">drawRect</a>( barrelRect );
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tmp.<a href="ntqpainter.html#end">end</a>();
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p-><a href="ntqpainter.html#drawPixmap">drawPixmap</a>( cr.<a href="ntqrect.html#topLeft">topLeft</a>(), pix );
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}
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TQRect <a name="f133"></a>CannonField::cannonRect() const
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{
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<a href="ntqrect.html">TQRect</a> r( 0, 0, 50, 50 );
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r.<a href="ntqrect.html#moveBottomLeft">moveBottomLeft</a>( <a href="ntqwidget.html#rect">rect</a>().bottomLeft() );
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return r;
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}
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TQRect <a name="f134"></a>CannonField::shotRect() const
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{
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const double gravity = 4;
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double time = timerCount / 4.0;
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double velocity = shoot_f;
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double radians = shoot_ang*3.14159265/180;
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double velx = velocity*cos( radians );
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double vely = velocity*sin( radians );
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double x0 = ( barrelRect.<a href="ntqrect.html#right">right</a>() + 5 )*cos(radians);
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double y0 = ( barrelRect.<a href="ntqrect.html#right">right</a>() + 5 )*sin(radians);
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double x = x0 + velx*time;
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double y = y0 + vely*time - 0.5*gravity*time*time;
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<a href="ntqrect.html">TQRect</a> r = TQRect( 0, 0, 6, 6 );
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r.<a href="ntqrect.html#moveCenter">moveCenter</a>( TQPoint( tqRound(x), height() - 1 - tqRound(y) ) );
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return r;
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}
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TQRect <a name="f135"></a>CannonField::targetRect() const
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{
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<a href="ntqrect.html">TQRect</a> r( 0, 0, 20, 10 );
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r.<a href="ntqrect.html#moveCenter">moveCenter</a>( TQPoint(target.x(),height() - 1 - target.y()) );
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return r;
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}
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TQRect <a name="f136"></a>CannonField::barrierRect() const
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{
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return TQRect( 145, height() - 100, 15, 100 );
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}
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bool <a name="f137"></a>CannonField::barrelHit( const <a href="ntqpoint.html">TQPoint</a> &p ) const
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{
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<a href="ntqwmatrix.html">TQWMatrix</a> mtx;
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mtx.<a href="ntqwmatrix.html#translate">translate</a>( 0, height() - 1 );
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mtx.<a href="ntqwmatrix.html#rotate">rotate</a>( -ang );
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mtx = mtx.<a href="ntqwmatrix.html#invert">invert</a>();
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return barrelRect.<a href="ntqrect.html#contains">contains</a>( mtx.<a href="ntqwmatrix.html#map">map</a>(p) );
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}
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bool <a name="f138"></a>CannonField::isShooting() const
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{
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return autoShootTimer-><a href="ntqtimer.html#isActive">isActive</a>();
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}
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TQSize CannonField::<a href="ntqwidget.html#sizeHint">sizeHint</a>() const
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{
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return TQSize( 400, 300 );
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}
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TQSizePolicy CannonField::<a href="ntqwidget.html#sizePolicy">sizePolicy</a>() const
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{
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return TQSizePolicy( TQSizePolicy::Expanding, TQSizePolicy::Expanding );
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}
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</pre><!-- eof -->
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<p><address><hr><div align=center>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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